#include <iostream>
#include <thread>
#include <future>
#include <chrono>

int Add(int num1,int num2)
{
    std::cout<<"加法!!1111\n";
    std::this_thread::sleep_for(std::chrono::seconds(5));
    std::cout<<"加法!!2222\n";
    return num1 + num2;
}

int main()
{
    std::cout<<"---------1-----------\n";
    std::future<int> result = std::async(std::launch::async,Add,11,22);
    std::this_thread::sleep_for(std::chrono::seconds(1));
    std::cout<<"---------2-----------\n";
    int sum = result.get();
    std::cout<<"---------3-----------\n";
    std::cout<<sum<<std::endl;
    return 0;
}
